Crude glycerol and cottonseed oil to control DDGS‐induced soft pork fat
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About this report:
The objective of this study was to assess the effect of feeding crude glycerol or minimally‐refined cottonseed oil on growth performance, carcass composition and fat firmness of growing‐finishing pigs. Feed ingredient prices often drive pork producers to include very high levels (30 to 50%) of DDGS in diets for growing‐finishing pigs. Such high inclusion rates of DDGS create very soft fat in the resulting pork carcasses due to the elevated concentration of unsaturated fatty acids. Supplementing diets high in DDGS (40%) with cottonseed products or crude glycerol may improve pork fat firmness.
In conclusion, neither minimally refined cottonseed oil nor crude glycerol additions to diets containing 40% DDGS increased belly firmness or reduced iodine values. Feeding crude glycerol diets had no impact on fatty acid composition of bellies. Including cottonseed oil actually increased iodine value of carcass fat.
Soft fat creates difficulties for pork processors and may ultimately influence the amount of DDGS that can be fed to finishing pigs.
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